StepFunWeights not listed·Not published context·— params
StepAudio 3 Chat Previewstepfun/stepaudio-3-chat-preview
StepAudio 3 Chat Preview accepts speech or text through the Chat Completions API and returns text replies, with contextual dialogue and tool calling.
Availability and billing notes
Reviewed September 21, 2026 · check the linked provider documentation for later changes.
Model ID stepaudio-3-chat-preview. Text replies only; streaming speech output and full-duplex interaction require the Realtime model.
The official pricing page lists a limited-time free preview as of September 21, 2026. StepFun says the preview ID will be retired when a paid version launches; this is not a permanent free-tier promise.
Capabilities
- speech_understanding
- chat
- tool_calling
Technical specs
- Context
- Not published
- Max output
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- Parameters
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- Release
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- Training cutoff
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- License
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Similar models
- StepAudio 3 Realtime PreviewStepFun·— params·Context not published
- StepAudio 3 ASR MaxStepFun·— params·Context not published
- StepAudio 3 Gen PreviewStepFun·— params·Context not published
- StepAudio 3 Music PreviewStepFun·— params·Context not published
- StepAudio 3 TTSStepFun·— params·Context not published
Compare with
- StepAudio 3 Chat Preview vs StepAudio 3 Realtime PreviewComparison planned — not yet published
- StepAudio 3 Chat Preview vs StepAudio 3 ASR MaxComparison planned — not yet published
- StepAudio 3 Chat Preview vs StepAudio 3 Gen PreviewComparison planned — not yet published
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